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10 / 12 page Datasheet SHT21 www.sensirion.com Version 1.0 – January 2010 10/12 If sensors are qualified for reliability and behavior in extreme conditions, please make sure that they experience same conditions as the reference sensor. It should be taken into account that response times in assemblies may be longer, hence enough dwell time for the measurement shall be granted. For detailed information please consult Application Note “Qualification Guide”. 8 Packaging 8.1 Packaging Type SHT2x sensors are provided in DFN packaging (in analogy with QFN packaging). DFN stands for Dual Flat No leads. The sensor chip is mounted to a lead frame made of Cu and plated with Ni/Pd/Au. Chip and lead frame are over molded by green epoxy-based mold compound. Please note that side walls of sensors are diced and hence lead frame at diced edge is not covered with respective protective coating. The total weight of the sensor is 25mg. 8.2 Filter Cap and Sockets For SHT2x a filter cap SF2 will be provided. It is designed for fast response times and compact size. Please find the datasheet on Sensirion’s web page by February 2010. For testing of SHT2x sensors sockets, such as from Plastronics, part number 10LQ50S13030 are recommended (see e.g. www.locknest.com). 8.3 Traceability Information All SHT2x are laser marked with an alphanumeric, five- digit code on the sensor – see Figure 17. The marking on the sensor consists of two lines with five digits each. The first line denotes the sensor type (SHT21). The first digit of the second line defines the output mode (D = digital, Sensibus and I2C, P = PWM, S = SDM). The second digit defines the manufacturing year (0 = 2010, 1 = 2011, etc.). The last three digits represent an alphanumeric tracking code. That code can be decoded by Sensirion only and allows for tracking on batch level through production, calibration and testing – and will be provided upon justified request. Figure 17 Laser marking on SHT21. For details see text. Reels are also labeled, as displayed in Figure 18 and Figure 19, and give additional traceability information. Figure 18: First label on reel: XX = Sensor Type (21 for SHT21), O = Output mode (D = Digital, P = PWM, S = SDM), NN = Chip Version, Y = last digit of year, RRRR = number of sensors on reel, TTTT = Traceability Code. Figure 19: Second label on reel: For Device Type and Part Order Number (See Packaging Information on page 2), Delivery Date (also Date Code) is date of packaging of sensors (DD = day, MM = month, YYYY = year), CCCC = Sensirion order number. 8.4 Shipping Package SHT2x are provided in tape & reel shipment packaging, sealed into antistatic ESD bags. Standard packaging sizes are 400, 1500 and 5000 units per reel. For SHT21, each reel contains 440mm (55 pockets) header tape and 200mm (25 pockets) trailer tape. The drawing of the packaging tapes with sensor orientation is shown in Figure 20. The reels are provided in sealed antistatic bags. Figure 20 Sketch of packaging tape and sensor orientation. Header tape is to the right and trailer tape to the left on this sketch. 8.0 2.0 4.0 0.3 1.3 R0.3 MAX R0.25 Ø0.15 MIN Ø0.15 MIN 3.3 0.25 SHT21 D0AC4 Device Type: 1-100PPP-NN Description: Humidity & Temperature Sensor SHTxx Part Order No. 1-100PPP-NN or Customer Number Date of Delivery: DD.MM.YYYY Order Code: 45CCCC / 0 Lot No.: XXO-NN-YRRRRTTTT Quantity: RRRR RoHS: Compliant Lot No. |
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Mô tả tương tự - 1-100707-01 |
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